#page {
    height: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
}

/*****************************/

#header {
    flex:none;
    background:#fff;
}

#centerWrapper {
    display:flex;
    flex: 1;
    width: 100%;
    overflow: hidden;
    user-select: none;
}

#footer {
    flex:0.5;
    width:100%;
} 

#footerdragbar {
    flex:none;
    height:6px;
    background:linear-gradient(0turn, #6B9ACB, #fff, #6093CA, #fff, #6B9ACB);
    cursor: ns-resize;
}